Engine-governor



(N0 Model.) I

r W. SNEDDON.

ENGINE GOVERNOR. I No. 247,426. Patented Sept. 20,1881.

WITNESSES: INVENTOR:

ATTORNEYS.

UNITE STATES PATENT OFFICE.

WILLIAM SNEDDON, OF BURRTON, KANSAS.

ENGlNE-GOVERNO R.

SPECIFICATION forming part of Letters Patent No. 247,426, datedSeptember 20, 1881. Application filed February 4, 1881. (No model.)

To all whom it may concern Be it known that I, WILLIAM SNEnnoN, ofBurrton, in the county of Harvey and State of Kansas, have invented anew and useful Improvement in EngineGovernors, of which the ibllowing isa Specification.

My invention is applicable to allgovernors employing fly-balls formovement of the valve, and has for its object to secure more perfect;uniformity in the speed of engines with which such governors areemployed.

My invention consists in a curved lever carryingarolling weight,combin'ed with the valvestem of the governor in such manner that theweight is shifted nearer to the lever-fulcrum as the speed decreases,and vice versa, thereby increasing and decreasing the resistance of thegovernor to the speed.

In the accompanying drawings, Figure l is a side elevation, partiallysectional, of a governor containing my improvement, and Fig.2 is across-section of the lever.

Similar letters of reference indicate corresponding parts.

A is the stand of the governor, in which the valve-stem a is fitted toslide vertically.

B B are the balls, hung by arms I) to the revolving upper part of thestand, and connected to valve-stem a, as usual.

0n the bottom plate of stand Ais fixed a post, 0, in the slot-ted upperend of whichis pivoted a curved arm or lever, O, that has its shorterarmextended beneath alu g, c, on valvestem a. The lever 0 curves upwardfrom post 0, and is grooved lengthwise or formed troughshaped, as shownin Fig. 2, to receive the ball f. The lever is also provided withguide-rods g at each side, which prevent the ball from falling out. Thepost 0 passes through an aperture in the bottom plate of the stand, andis clamped by a nut at each side of the plate, so that it may be raisedand lowered as desired to vary the inclination of lcverO.

In operation, the speed being normal and valve-stem a moved down by riseof balls B, the lever O is correspondingly raised at its outer end andball f rolls toward post a. If the speed is checked from any cause, thefall of balls B causes the rolling weight f to roll outward; then asspeed increases the weight freturns inward. Thus a tension, increasingand decreasingas required, is kepton the valvestem 0 and suddenmovements of the stem are prevented.

The moving weight fmay be fitted to slide instead of rolling, as shown.

I am aware that itis not new to use a weight suspended from a lever byan arm attached to a friction-roll running in the slot of a vibratorylever, or to use mercury running in a cavity of the vibratory lever; but

What I claim as new is-- 1. In a steam-engine governor, the combination,with the lever G, ofa ball,f, arranged to run loosely in a groovethereof, as and for the purpose specified.

2. In an engine-governor, the grooved lever 0, ball f, running looselyin the groove, post a, sliding valve-stem a, and fly-balls B, combinedfor operation substantially as shown and described.

WILLIAM SNEDDON.

Witnesses J AMES M. TUPPER, W. O. PAsLEY.

